Let's Encrypt

Free SSL/TLS certificate authority

82
Project is healthy
Funding
Stable
Maintenance
Active
Contributors
Healthy
Bus Factor
Medium risk
Metrics last updated: 6 days ago (2026-02-07)

Overview

Let’s Encrypt is a nonprofit certificate authority providing free TLS certificates to more than 300 million websites, making HTTPS accessible to everyone.

Importance

  • Powers encryption for millions of websites
  • Democratized HTTPS adoption
  • Foundation for web security
  • Critical for privacy online

Key Features

  • Free certificates
  • Automated issuance (ACME)
  • 90-day certificates
  • Wildcard support

Sustainability

Let’s Encrypt is run by ISRG with strong corporate sponsors including Mozilla, Cisco, Chrome, and major tech companies.

Dependencies

Let's Encrypt
unknown

Impact Analysis

0 Direct Dependencies
0 Dependent Projects